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Idle Process Exhausting CPU

 
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# 1  
Old 11-04-2014
Idle Process Exhausting CPU
I noticed when having some trouble with code I was testing that the CPU was becoming exhausted and I would have to reboot. After rebooting a couple times I decided to check for other problems before trying my code again. That's when I noticed that the CPU with the idle process was through the roof:

Code:
  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND                                                                       
   11 root     120   0     0   64    0 R 800.0  0.0   4185:44 idle

I wanted to use lsof on the process, but apparently that is not an option with kFreeBSD. I tried using sockstat, but it seemed that no parameters I tried worked. I tried searching online, but all the documentation seemed to be for FreeBSD and not kFreeBSD. The man page didn't seem to be much help either.

Any suggestions?
# 2  
Old 11-04-2014
I believe that kFreeBSd supports the /proc filesystem - you can use that to get what you want.

Code:
cd /proc/11
ls -l   # list the component "files" and "directories"

There should be some thing like fd or path that will do the job of identifying open files.
This User Gave Thanks to jim mcnamara For This Post:
Azrael
# 3  
Old 11-05-2014
You are correct. /proc/11 exists, but I can't cat it. It appears to be soft-linked to nowhere:

Code:
# ls -l /proc/11
total 0
-r--r--r-- 1 root root 0 Nov  5 17:49 cmdline
lr--r--r-- 1 root root 0 Nov  5 17:49 cwd -> unknown
-r--r--r-- 1 root root 0 Nov  5 17:49 environ
lr--r--r-- 1 root root 0 Nov  5 17:49 fd -> unknown
-r--r--r-- 1 root root 0 Nov  5 17:49 maps
lr--r--r-- 1 root root 0 Nov  5 17:49 root -> unknown
-r--r--r-- 1 root root 0 Nov  5 17:49 stat
-r--r--r-- 1 root root 0 Nov  5 17:49 statm
-r--r--r-- 1 root root 0 Nov  5 17:49 status

Do you know how I would view this or what its linked to?
Last edited by Azrael; 11-05-2014 at 07:59 PM..
# 4  
Old 11-05-2014
I do not know kFreeBSD at all well. I do know the /proc filesystem is called procfs. So, there should be some C include file (header file) that has the structure of all of the procfs files. These are used in all of the commands like ps, top, etc.

Try this:
Code:
find /usr/include -type f -name '*proc*'

This User Gave Thanks to jim mcnamara For This Post:
Azrael
# 5  
Old 11-05-2014
This:
https://wiki.debian.org/Debian_GNU/k...le_CPU_time.3F

says basically that the idle process is like kernel processes under VMS (swapper) and other OSes. It is not consuming cpu. It runs when absolutely nothing else wants the cpu.
You can view the source as well.

Your problems are coming from some other source.
This User Gave Thanks to jim mcnamara For This Post:
Azrael
# 6  
Old 11-06-2014
Thank you for the incite. I confirmed what you pointed at in the wiki was correct. After I generated a little activity the idle process dropped off to nothing. I'll go back to debugging my code now. Thanks again!
 
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